patch-2.1.47 linux/drivers/misc/parport_arc.c

• Lines: 78
• Date: Wed Jul 23 11:07:12 1997
• Orig file: v2.1.46/linux/drivers/misc/parport_arc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.46/linux/drivers/misc/parport_arc.c linux/drivers/misc/parport_arc.c
@@ -0,0 +1,77 @@
+/* $Id$
+ * Parallel-port routines for ARC onboard hardware.
+ *
+ * Author: Phil Blundell <pjb27@cam.ac.uk>
+ */
+
+#include <linux/tasks.h>
+
+#include <asm/ptrace.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#include <linux/config.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/malloc.h>
+
+#include <linux/parport.h>
+
+#include <linux/arch/oldlatches.h>
+
+#define DATA_LATCH    0x3350010
+
+/* ARC can't read from the data latch, so we must use a soft copy. */
+static unsigned int data_copy;
+
+static void arc_write_data(struct parport *p, unsigned int data)
+{
+	data_copy = data;
+	outb(data, DATA_LATCH);
+}
+
+static unsigned int arc_read_data(struct parport *p)
+{
+	return data_copy;
+}
+
+static struct parport_operations arc_ops = 
+{
+	arc_write_data,
+	arc_read_data,
+
+	arc_write_control,
+	arc_read_control,
+	arc_frob_control,
+
+	NULL, /* write_econtrol */
+	NULL, /* read_econtrol */
+	NULL, /* frob_econtrol */
+
+	arc_write_status,
+	arc_read_status,
+
+	NULL, /* write_fifo */
+	NULL, /* read_fifo */
+	
+	NULL, /* change_mode */
+	
+	arc_release_resources,
+	arc_claim_resources,
+	
+	NULL, /* epp_write_block */
+	NULL, /* epp_read_block */
+
+	NULL, /* ecp_write_block */
+	NULL, /* epp_write_block */
+	
+	arc_save_state,
+	arc_restore_state,
+
+	arc_enable_irq,
+	arc_disable_irq,
+	arc_examine_irq 
+};